<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>axios+vue</title>
</head>
<body>
    <div id="app">
        <input type="button" value="获取笑话" @click="getJoke">
        <p>{{ joke }}</p>
    </div>
    <!-- 官网提供的 axios 在线地址 -->
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        /*
            接口：随机获取一条笑话
            请求地址：https://autumnfish.cn/api/joke
            请求方法：get
            请求参数：无
            响应内容：随机笑话
        */
        var app = new Vue({
            el:"#app",
            data:{
                joke:"很好笑的笑话",
            },
            methods:{
                getJoke:function(){
                    console.log(this.joke);
                    var that = this;
                    axios.get("https://autumnfish.cn/api/joke").then(
                        function(response){
                            //console.log(response);
                            console.log(response.data);
                            //console.log(this.joke);  //this发生了改变，输出的joke 未定义
                            that.joke = response.data;
                        },
                        function(err){
                            console.log(err);
                        }
                    )
                },
            },
        })
    </script>
</body>
</html>